diff options
| author | Juri Lelli <juri.lelli@redhat.com> | 2025-03-13 18:00:04 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-03-17 11:23:41 +0100 |
| commit | f6147af176eaa4027b692fdbb1a0a60dfaa1e9b6 (patch) | |
| tree | f052b241571a858d1b2740e483a74469d64207d0 | |
| parent | 3bffa47a02636ed4134d558caecd35e92051e48d (diff) | |
sched/deadline: Ignore special tasks when rebuilding domains
SCHED_DEADLINE special tasks get a fake bandwidth that is only used to
make sure sleeping and priority inheritance 'work', but it is ignored
for runtime enforcement and admission control.
Be consistent with it also when rebuilding root domains.
Fixes: 53916d5fd3c0 ("sched/deadline: Check bandwidth overflow earlier for hotplug")
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Waiman Long <longman@redhat.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lore.kernel.org/r/20250313170011.357208-2-juri.lelli@redhat.com
| -rw-r--r-- | kernel/sched/deadline.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index ff4df16b5186..1a041c1fc0d1 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -2956,7 +2956,7 @@ void dl_add_task_root_domain(struct task_struct *p) struct dl_bw *dl_b; raw_spin_lock_irqsave(&p->pi_lock, rf.flags); - if (!dl_task(p)) { + if (!dl_task(p) || dl_entity_is_special(&p->dl)) { raw_spin_unlock_irqrestore(&p->pi_lock, rf.flags); return; } |